Cylinder printing press



R. F. MIEHLE, JR

CYLINDER PRINTING PRESS May 1, 1923.

:s sheets-sheet 1 Filed April 6, 1921*v` R. F. MIEHLE, JR

CYLINDER PRINTING PRESS May l, 1923. 1,453,853`

Filed April e, 1921 s sheets-smet 2 2 J/zzfezzzor May 1, 1923.

1,453,853 R. F. MlEHLE, JR

YLINDER PRINTING PRE-SS Filed April` e. 1921 s sheets-sheet s lowers the cylinder into printing relation with the bed, which has during this action attained its normal speed on the printing stroke thereof. By the time the leading edge of the sheet reaches the printing point, the position shown in Figs. l and 3, the lowering of the cylinder has been accomplished and the bed has attained its normal speed. The printing operation then follows with the bed and cylinder 3 in rolling Contact. A short time after the cylinder 3 is lowered and begins t0 print, the cylinder 5 having taken the preceding sheet from the transfer cylinder starts to print in rolling contact with the bed, it having been lowered after the sheet was transferred thereto from the transfer cylinder and before the leading` edge of the sheet thereon reached the printing point. After the sheet on the cylinder 3 has been printed. it is transferred to the transfer cylinder which retains it by means of grippers 2T operated by the usual mechanism after which the sheet is transferred v to the cylinder 5 preparatory to the next printing operation thereon, the cylinder 5 being equipped, as is the cylinder 3, with grippers, not shown, operated by the usual mechanism. The impression cylinders are raised during the back stroke of the bed to clear the forms 23, see Fig. 2, on the bed, the usual bearers 29 being provided on the bed extending along on opposite sides of the forms and coacting with edge peripheral bearer portions 30 on the impression cylinders. Both impression cylinders take the sheets when they are in the upper positions of their vertical movement, as shown in Figs. 1 and 2, in which position the cylinder gears are fully meshed with the gear 18 of the transfer cylinder.

The impression cylinders are registered with the bed after they have been moved into printing relation therewith and prior to the printing operation by the following described mechanism.

nasmuch as the mechanism for registering each impression cylinder with the bed is the same and operates in the same manner, I will describe only the mechanism of the cylinder 3, the same reference characters being given to the same parts of ther mechanism which registers the cylinders 5 with the bed.

A register segment 3l is secured in fixed position on the side of the cylinder 3 in a usual manner by means of headed screws 32 and dowel pins 33. This segment is provided with spur gear teeth 34 facing outwardly in a radialdirection and having their pitch lineA in line with the periphery of the bearer surfaces 30 of the cylinder, and these teeth extend in both directions from the point on the cylinder where the leading edge of the sheet is held on the cylinder by the grippers 26. The side the bed, corresponding with the side of the cylinder 3 upon which the register segment is mounted, is provided adjacent its lower edge with a lateral extension 35 disposed adjacent the leading edge of the form 28 of the cylinder 3, which extension forms an upwardly facing supporting surface. Secured upon this supporting surface of the extension 35 by headed screws 36 is a bearing block 37 forming an upwardly facing bearing surface. Resting upon this surface for-movement thereon is a register rack bar 3S which is maintained in such position for limited movement longitudinally of the path of the bed by shouldered and headed studs 39 passing through apertures 40 in the rack bar and screw threaded into the side of the bed, the apertures 40 being elongated in the direction of movement of the bed to permit movement of the rack bar relatively to the bed in such direction. See Fig. 5. The heads of the studs 39 and the side of the bed form side bearings for the rack bar. The rack bar is thus adapted for limited movement in line with the movement of the bed. The rack bar is provided with upwardly facing rack teeth 4l adapted to interengage with the teeth of the segment. A stop block 42 is secured on the side of the bed on which the eX- tension 35 is disposed, and is secured at the end of such extension adjacent the leading end o-f the rack bar Awith relation to the clockwise rotation of the cylinder 3 as indicated by the arrows in Figs. l, 3, and el.

in a direction to limit movement of the rack bar in a direction to advance the cylinder with relation to its driven relation with the bed when the rack bar is engaged with the segment. A loclr nut let secures the screw 43 in adjusted relation with the stop block in ausual manner. A headed and shouldered stud l5 is screw threaded into the side of the bed from which the extension 35 extends and is disposed adjacent the end of this extension opposite that on. which the stop block 42 is disposed on a horizontal axis normal to the path of movement of the bed. Mounted for pivotalmovcment on this stud 1between the head thereof and the side of the bed is a lever 46 at the free end of which a cam roller 47. is mountedon a horizontal axis normal to the path of movement of the bed, This lever extends substantially horizontal from the stud 45 in a direction away from the rack bar, and downward movement of the lever is limited bya lug lever 4G is providedxwith a vertical extenlilo iis

ladjustn'ie'nt 'screw' 43 isadapted to ab'iit. A

l'ockiniit 52 secures the sere-w51 in adjusted relation ywith the extension 5() in a usual manner.

"A cani 53 is secured to'a lateral extension 54 of one'of the vertical standards 55 of the gii'der 2 iindei'rlying` the cylinder 3, and eitends longitudinally of the path of thebed below the roller 47'of`the'levei" 46. lThe upwardly yfacing surface of this clim vconstitutes a cain ySurface which has a lower dwell portion 56 and an upper vdwellportion 57 connected by aninclined active portion 58. The bed moves to the `left"in.Figs."1, 3, and 4"durin`g the'print-ing operation in correspondence with the constant clockwise rota- 'ytionof the impression cylinder S, and the portions', 57, and'58 of the surface 'of the 'cam-are so arranged that diiringthe movement of the register' seginentBl and the rfaclr bar'SS into Y"cooperative relation the roller 47'is" init's lowerposition.' it passing over xthe lowerdwell portion l56 jst asfthe' register rack'and vsegment attain cooperative relation', 'as'shown vin Figl. l/Vhile the lever 46 is in its lower'position'as' shown iny Figs. l, 3j and 6 the rack is allowed limited movement longitudinally of the tr'ai'elofthe bed 'forthe reason 'that the 'adjustment 'screws 43 and l'are positioned' to permit play of the rack bar between the same. "This play of the rack permits the engagement of the teeth of -the segment with the teeth of the 'rackivithoi'it effecting registry of the cylinder with the bed wherebyY the engagement of the teethr` of the segment and the rack is not accompanied by anyr jar oi" shock incident to the sudden adjustment of the bed and cylinder by impact of the teeth of the segment'and rack. 'The adjustment of the screws 43 and'l is such that the teeth'o'f the segment and rack cannot i'ide'on one another inany position ofthe rack with tl'icbed 'or in any possible position ofthe cylinder with the bed in the running of the press and yto effect the maximum of play of the 'rack with the bed the leading teeth of the 'i'aclr are reduced 'below the true gear vtooth contour thereof,' as 'designated at 59. andthe vouter corners'of the leading teeth of thesegment are roun'dedoff'in 'aiisualinann'er for the same purpose. After the teeth of they segment andrack are engaged the roller 47 vencounters the active 'portionl 58 vvof the cam' surface, which pivots the leve-r 46 in a coi'inL ter-clockwise direction 'in' Figs..l 1 ."3, and 4 and contines the rack bar' against 'tlfiea-d'j'ust" ment screw 43. thereby effecting any necessary adjustment of the cylinder and Abed to register the same just before the printing operation is initiated. SeeFig. 4. 'After this is accomplished the roller 47 moves along the upper dwell portion 57 ofthe cani and maintainsl the' rack inv such-confinement until the printing operation is initiated, after which the roller 47 encounters a downwardly inclined portion 60 of the cam. 'and releases the rackbar.' Afterthis the lrolling 'Contact of the bed and cylindermaint'ains the registry thereof. V0n the baclforjiionprinting stroke of ,the bed fthe impression cylinders are raised to clear the (forni.y The teethof the segment and rack clear when the impression cylinders are trippechas shown in Figs. vland 2, vand when rthe lirripression cylinders are ltripped the action of the lever 46 operated by cam 53 i'snon-eifective by reason ofthe clearance of the V.teeth of theY v segment and rac-k.A In the back or non-'printing stroke'of the bed the lever 46`is opei'- ated by the cam' 53 in a mannerv reverse ,to that above described. i

By reason of the disposition of the axis of gear 18' with relationto each ofthe cylinderjgears 17 and the" direction of move- "ment 0f the 'searsl when 'the respective impression cylinders y'are moved into printing relation with the bed.A lost; motion is reffected between the gear'lS and v.each cylinder gea-I' 17 when the 'respective 'impression cylinders are in printing relation with the bed, this lost motion being' effected 'by the separation of thecylinder vgears from the gear 18 without wholly unmeshing the` saine, l

as-'indicatedfat 61'fi`n'Fig. 3. The amount of lost mot-ion between the gears' V17 and" 18 is exaggerated in'- Fig.l 3 to show the saine morec'learly, and the vamount eifec'tedin any actuall mechanism *of thev proportions shown ifs'rel'atively slight and not 'sufficient to'eifect the' riding of the' teethv of .the 'segment and lraclco'n' topof'each other in any possible'position'iof the 'cylinder with rela'- tion to' the'bed. This lost motion permits a degreebf freedom'between the `impression Cylinders and 'bed vduring the periods when the impression cylindersr are firi printing re` lat-ion'with the bed."' Thejniovement ofeach rackba'r 38 under the inii'uence oftlie 'respective lcam 53 isin jthe same 'direction as'the bed x during the' printing stroke thereof. This ymovement of each rack oar 'is adapted to'advance'thfe resp'ectiv'e'I impressiony cylinder'witli respect tothe driven relation therej-` of t the hed i'v'lienfthe bed and'cylinder are registeredU thereby', Ithis 'action relieving the driven"Y faces"v of the 'teeth'of the cylinder gears fromthe drii'fingfaceswof the teethof tliegeai 18 'whei'eby'the impression cylinders. freely roll under the influence yofthe bed after tlie registry tl'i'ereof rbyt-lie registering -inech'ani'sinf'ff This Vlost'iiiotion also'pern'iits 'a limited movement between the impression cylinders 3 and so that they do not interfere with each other during the printing operations thereof. y

While l have herein shown and particularly described the preferred embodiment of my invention I do not Wish to be limited to the precise details of construction shown as changes may readily be made Without departing from the spirit of my invention, but having thus described my invention .l claim as new and desire to secure by Letters Patent the following' l. A printing press including a printing couple, one of the members of which is a rotating cylinder', mechanism for driving the couple members in unison throughout the cycle of operation thereof, cooperating ister elements mountedV to move with respective couple members, one of said register elements being mounted for movement with respect to its couple member int-o and out of a predetermined registering position in a path to cooperate with the other register element to effect necessary relative movement of said couple'members to register the same when moved into said registering position, a stop limiting movement of said movable register element in one direction of its said movement With respect to its couple element, and cam mechansm operating in timed relation with the operation of said couple members and adaptedto move periodically said movable register element against said stop to effect the positioning of this register element in such predetermined registering position.

2. A printing press inclu-ding a printing couple, one of the members of Which is a rotating cylinder, mechanism for driving the couple members in unison throughout the cycle of operation thereof, cooperating register elements mounted with vrespective couple members and adaptedxto attain periodically coopera-tive engagement, one of said register elements being mounted for movement with respect to its couple member into and out of predetermined registering position in a direction in line With the movement of its couple member, a stop limiting the movement of said movable register element in one direction of its movement With respect to its couple member, and cam mechanism limiting the movement of said movable register element in the opposite direction of its movementwvith respect to its 'couple member and operating in timed relation with the operation of the couple members and adapted to effect periodically the positioning of said movable register element against said stop and timed to effect such positioning when. said register elements are in engagement.

3. A printing press including a printing couple, one of the-members of 'which is a rotating cylinder, and the other member of which is a reciprocating bed, mechanism for driving the couple members in unison throughout the cycle of operation thereof, cooperating register elements mounted with respective couple members and adapted to attain periodically cooperative relation, the register element which is mounted for movment with the bed being mounted with respect thereto-into and out of a predetermined registering position in a path to cooperate With the other register element to effect necessary relative movement of said couple members to register the same when moved into said registering position, and mechanism including a stationary cam eX- tending longitudinally of the path of the bed and adapted to effect periodically the positioning of said movable register element in said registering position and timed to effect such positioning When said register elements are in cooperative relation.

4. A printing press including a printing couple, one of the membersof which is a rotating cylinder, means for driving the couple members in unison, a register element mounted on one of the couple members, and means cooperating with said register element to periodically register the couple members including a register elementengaging member mounted on the other couple member for movement in a direction to effect adjustment of the couple members to register the same and a stationary cam controlling the movement thereof with respect to its couple member.

A printing press including a printing couple, one of the members of which is a rotating cylinder, means for driving the couple members in unison, a register element secured on one of the couple members, and means cooperating with said register element to periodically lregister the couple including a lever pivotally mounted on the other couple member and a stationary cam controlling the pivotal movement thereof.

6. A printing press including a printing couple, one of the members of Which is a rotating cylinder, means for driving the couple members in unison, a register element secured on one of the couple members, and means cooperating with said register element to periodically register the couple members including a register element engaging member mounted on the other couple member for movement in a direction to effect adjustment of the couple members to register the same, a stop on the last mentioned couple member for limiting movement of said register element engaging member in said direction, a lever pivotally mounted on said lastmentioned couple member for moving said register element engaging member aga-inst said stop, and a stationary cam for operating said lever. j

7. A printing press including a printing couple, one of which is a rotating cylinder and the other` of Which is a reciprocating bed, means for -driving the cylinder and bed in unison, a register element secured on the cylinder, and means cooperating With said register element to periodically register the couple members including a register element engaging member mounted on the bed for movement kin a direction to effect adjustment of the couple members to register the saine and a stationary cam extending lengthwise of the bed for controlling movement of said register element engaging member with respect the bed.

8. A printing press including a printing couple, one of the members of which is a rotating cylinder and the other of which is a reciprocating bed, means for driving the cylinder and bed in unison, a register segment mounted on the cylinder, a cooperating register rack mounted on the bed for movement lengthwise thereof, and means forv rotating cylinder andthe other'of Which is 'I Va reciprocating bed, means for driving the cylinder and bed in unison, a register seg- "ment secured on the cylinder, a cooperating Vregister rack mounted on the bed for movevment lengthwise thereof, a stop on the bed for limiting movement of the rack with respect the bed in the direction of the printingv stroke or the( bed, a lever' pvotally mounted on the bed lfor moving the rack ,against said stop, and aI stationary cam for operating said lever.

In Witness whereof I hereunto aHiX my signature this 4th day of April, 1921, A. D.

ROBERT F. MIEHLE', JR.'

printing press including a printingk 

